increase A while keeping V

[duduchier]

Hello,

I'm using a 72 channel DMX controller for an artistic project in China. It can provide 12V and 50mA per output and I need 12V 100-400 mA instead.
What can I do ?
Someone advised me using an opto-isolator circuit but I want to be able to make fades. eg: I want the output voltage change when the input voltage changes.
What can I do? Where can I find a schematic for this?

Thank you very much !!

 

[kchriste]

All you may need is one transistor per output. Of course the 12V power supply will need to be able to handle the increased current demand also. Do you have a link to the spec's on your DMX controller? Also, we need to know what you are trying to control with the DMX.

 

[duduchier]

increase A while keeping

Yes,

Here is the product. A ShowTec Multi-Exchanger (ME-72):
https://www.new-line.nl/webshop/view.asp?i=3636

I can't find the amperes but I know from someone who's got the same, it gives 50mA.

Thank you very much!

 

[kchriste]

German isn't my native tongue, so I can't really read the datasheet easily. It appears that you'll need an additional power supply to supply the extra current. It also appears that the unit is designed to generate voltages of both polarities and maybe drive another module which drives the lights. What are you going to drive with it?